Headlamp



FIG. 1 is a perspective view of a headlamp illustrating our new design with the broken line showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a side view thereof; both sides, the top and the bottom views being similar; and,

FIG. 3 is a front view thereof. 

The ornamental design for a headlamp, as shown and described. 